Electric arc isolating device of miniature circuit breaker
A technology of small circuit breakers and isolation devices, which can be applied to circuit breaker parts and other directions, and can solve the problems of not using arc isolation and arc leakage.
Active Publication Date: 2014-05-14
SHANGHAI LIANGXIN ELECTRICAL
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide an arc isolation device for a miniature circuit breaker to overcome the defect of arc leakage caused by no arc isolation or only gap arc isolation in the prior art
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[0018] figure 1 , 2 It is a miniature circuit breaker related to the present invention. It includes a housing 3, a handle 5, an action mechanism 2, and a magnetic system 4. The housing 3 includes an inner cavity, and the handle 5, the action mechanism 2, and the magnetic system 4 are all arranged in the inner cavity. The handle 5 is pivotally connected to the housing 3, so the handle 5 can rotate around the pivot. The actuating mechanism 2 is also pivotally connected to the casing 3, and the actuating mechanism 2 can rotate around another pivot. The handle 5 is connected to the action mechanism 2 through a connecting rod 8, one end of the link 8 is connected to the end surface of the handle 5, and the other end is connected to the action mechanism 2, so the handle 5 and the action mechanism 2 are linked. Depend on Figure 7 It can be seen that there is a gap 36 between the handle 5 and the housing 3 , and part of the arc will leak out through the gap 36 . In addition, th...
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The invention discloses an electric arc isolating device of a miniature circuit breaker, the electric arc isolating device comprises a shell and an inner cavity of the shell, the inner cavity of the shell comprises a first region and a second region, a handle is arranged in the first region, an actuating mechanism is arranged in the second region, the handle and the actuating mechanism are respectively connected with the shell through pivots, the handle is linked with the actuating mechanism, the inner cavity is also provided a third region which is adjacent to the first region, a magnetic system and a contact terminal are arranged in the third region, a first clapboard is arranged between the first region and the third region, two ends of the clapboard are connected with two side walls of the shell, and the first region is closed. Compared with the prior art, the effect is positive and obvious. By adopting the insulating clapboard in the shell of the miniature circuit breaker and a protective fence which is formed by the high and closed clapboard to resist the electric arc, the technical problem of being incapable of preventing the electric arc from leaking and spraying from the handle in the prior art owning to having no arc isolation measure or only having partial gapped arc isolation is solved.
Description
technical field [0001] The invention relates to the field of circuit breakers, in particular to an arc isolation device in a small circuit breaker. Background technique [0002] In the prior art, the manual operation of opening and closing of the small circuit breaker is basically realized by the handle. When the circuit breaker is working normally, an arc will be generated at the moment when the dynamic and static contacts are opened, and most of the arc will be led to the extinction through the arc ignition angle. The arc chamber goes out. A small part of the arc will leak out from the gap between the handle and the housing along the opposite direction. On the one hand, the handle will be burnt and blackened, which may affect the operating performance and reliability; on the other hand, it may cause safety hazards to electrical equipment and operators. At present, miniature circuit breakers do not have this protection measure. Even if some individual circuit breakers hav...
Claims
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IPC IPC(8): H01H73/06H01H73/18
Inventor 张兰晶段辉
Owner SHANGHAI LIANGXIN ELECTRICAL